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posted by martyb on Thursday September 12 2019, @09:00PM   Printer-friendly
from the airborne-life-forms? dept.

For the first time, water has been detected on an exoplanet orbiting in its star's habitable zone.

A new study by Professor Björn Benneke of the Institute for Research on Exoplanets at the Université de Montréal, his doctoral student Caroline Piaulet and several of their collaborators reports the detection of water vapour and perhaps even liquid water clouds in the atmosphere of the planet K2-18b.

The planet is nine times the mass of Earth and circling more closely to its smaller M3 dwarf star with, a year length of only 33 days. K2-18b "receives virtually the same amount of total radiation from its host star" as Earth.

Scientists currently believe that the thick gaseous envelope of K2-18b likely prevents life as we know it from existing on the planet's surface.

Still, according to Professor Benneke "This represents the biggest step yet taken towards our ultimate goal of finding life on other planets, of proving that we are not alone."

Journal Reference
Björn Benneke, Ian Wong, Caroline Piaulet, Heather A. Knutson, Ian J.M. Crossfield, Joshua Lothringer, Caroline V. Morley, Peter Gao, Thomas P. Greene, Courtney Dressing, Diana Dragomir, Andrew W. Howard, Peter R. McCullough, Eliza M.-R. Kempton Jonathan J. Fortney, Jonathan Fraine. Water Vapor on the Habitable-Zone Exoplanet K2-18b. Astronomical Journal (submitted), 2019 [link]


Original Submission

 
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  • (Score: 2) by Mykl on Friday September 13 2019, @05:35AM

    by Mykl (1112) on Friday September 13 2019, @05:35AM (#893541)

    Based on our problems with sun tan, we are probably from a red dwarf star.

    Wut.


    People whose ancestors lived in sunny places (e.g. sub-Saharan Africa, Australia, Middle-East) have no problems at all with sun tan. Neither do people whose ancestors lived in low-sun places (e.g. northern Europe) when those people are also in that place.

    I am of English background, and live in Australia. Yes, I have a problem with sun tan (actually sun burn), however I do not live in a habitat that my ancestors evolved to live within.

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